<?php
/* 
 *  The MIT License
 * 
 *  Copyright 2010 http://www.bxdframework.org
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 * 
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 * 
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */

/**
 * Gestore dei plugin per la registrazione e l'inizializzazione.
 *
 * @author Fabrizio Filieri
 */
class BXDPluginManager
{
	private static $instance = null;

	private $plugins;

	private function __construct()
	{
		$this->plugins = array();
	}

	/**
	 * Ottiene l'istanza del plugin manager
	 * @return <EventManager> l'istanza delplugin manager
	 */
	public static function getInstance()
	{
		if (self::$instance == null)
			self::$instance = new BXDPluginManager();

		return self::$instance;
	}

	/**
	 * Registra un plugin.
	 * @param <EventListener> $eventListener
	 */
	public function register($plugin)
	{
		if (!isset($this->plugins[$plugin->getName()]))
		{
			$this->plugins[$plugin->getName()] = $plugin;
		}
	}

	/**
	 * Elimina la registrazione di un plugin.
	 *
	 * @param <BXDPlugin> $plugin il plugin da eliminare
	 */
	public function unregister($plugin)
	{
		if (isset($this->plugins[$plugin->getName()]))
		{
			$plugin->deinit();
			unset($this->plugins[$plugin->getName()]);
		}
	}

	/**
	 * Inizializza tutti i plugin registrati. Questo metodo è chiamato in automatico nel costruttore
	 * della classe BXD non appena viene istanziata per la prima volta.
	 */
	public function initAll()
	{
		foreach ($this->plugins as $plugin)
		{
			$plugin->init();
		}
	}

}

?>
